a{
    /*消除下划线*/
    text-decoration: none;
}

.top {
    background-color: black;
    width: 1905px;
    height: 550px;
    margin: auto;
    text-align: center;
}

.top_bar {
    /*background-color: black;*/
    height: 50px;
    width: 975px;
    margin: auto;
    /*text-align: center;*/
}

.top .top_bar span{
    margin-top: 10px;
    float: left;
    display: block;
}

.top .top_bar ul{
    float: right;
    display: block;
}

.top_car {
    width: 1150px;
    height: 440px;
    /*margin-left: 375px;*/
    /*text-align: center;*/
    margin:0 auto;
}

div {
    display: block;
}
